TM 5-6115-434-12
c.
Installation. Install tube assemblies, hose assemblies, clamps, and plumbing fittings in reverse order of removal
using new packings and gaskets as applicable.
Caution
Be sure tube and hose assemblies do not make direct physical contact with other surfaces of
the power unit. Use clamps to support tube and hose assemblies and prevent contact. The
high frequency vibration of the power unit may cause rapid wear and damage to the tube and
hose assemblies leading to failure of the parts.
3-17. External Fuel System Filter Elements (fig. 3-7)
a.
Removal. Shut off fuel supply to external fuel system filter assembly. Remove eight nuts, washers, and bolts.
Separate retaining rings and' filter cases from support stand. Remove and discard filter elements and gaskets.
Note
If it becomes necessary to clean and replace filter elements while power unit is in operation
and it is not desirable or possible to shut off fuel supply to fuel system filter assembly, use
bypass valve on filter assembly to shut off fuel to each filter, individually. Follow procedure
described in paragraph 8-17 to remove individual filters.
b.
Cleaning and Inspection
(1)
Wash parts with an approved cleaning solvent and dry thoroughly with filtered compressed air.
(2)
Visually inspect filter case, retaining rings, and support stand for corrosion, cracks, or other obvious
damage. Inspect nuts, bolts, and plumbing fittings for damage to threads. Inspect drain petcocks in bottom of filter
cases for damage. Replace all damaged parts.
c.
Installation. Install new filter elements and gaskets in reverse order or removal procedure. Connect fuel supply
to external fuel filter assembly and check for fuel leakage. There must be no leakage.
3-18. Engine Fuel Filter Assembly (fig. 3-8)
a.
Removal. Without removing engine fuel filter assembly, unscrew filter case from filter assembly and remove and
discard filter element, packing and gasket.
b.
Cleaning and Inspection.
(1)
Wash parts with an approved cleaning solvent and dry thoroughly with filtered compressed air.
(2)
Visually inspect filter case or corrosion, cracks, damaged threads or other obvious damage.
c.
Installation. Dip replacement filter element in oil (Military Specification MIL-O-6081 grade 1005 or 1010) and
install element and new packing and gasket in reverse order of removal procedure. Tighten filter case securely but do
not overtorque.
3-19. Fuel Control Fuel Filter (fig. 3-8)
a.
Removal Without removing fuel control unit, unscrew filter cap and remove packing, filter spring, filter element,
and packing.
b.
Cleaning and Inspection.
(1)
Wash parts with an approved cleaning solvent and dry thoroughly with filtered compressed air.
(2)
Visually inspect filter spring for cracks, or other obvious damage. Inspect filter cap for cracks, corrosion,
damaged threads, or other obvious damage. Replace all damaged parts.
c.
Installation. Install replacement filter element and new packing in reverse order of removal procedure. Tighten
filter cap securely but do not overtorque.
3-20. Filter Assembly (fig. 3-8)
a.
Removal. Remove tube assemblies from filter assembly. Remove two attaching bolts, six washers, two nuts
and remove filter assembly from power unit, b. Installation Install replacement filter assembly in reverse order of
removal procedure. Tighten attaching bolts securely. Connect tube assemblies, using new packing.
3-21. Fuel Boost Pump (fig. 3-8)
a.
Removal.
(1)
Remove wiring harness connector, tube assembly and hose assembly from fuel boost pump.
(2)
Remove four attaching bolts, eight washers and four nuts; remove fuel boost pump from power unit.
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